Four-month-old babies with colds and runny noses can be relieved through daily care, general treatment, taking medication and other ways of treatment. 1. Daily care: When a four-month-old baby has a cold and runny nose, it is recommended that parents pay attention to the air circulation in the baby’s room, maintain the appropriate temperature and humidity, and pay attention to keeping warm to avoid aggravation of the condition caused by cold. 2. General treatment: It is recommended that parents can let the baby drink warm water in moderation, use physiological sea salt water or nasal professional cleaning solution to clean the nasal cavity to maintain a smooth airway. 3. Taking medication: baby colds are mostly caused by pathogenic infections, viral infections generally do not require special treatment with antiviral drugs. If the combination of bacterial infection, should follow the use of penicillin, cefepime and other antibacterial drugs; if the influenza virus caused by the application of oseltamivir and other antiviral drugs. All of the above drugs should be used under doctor’s guidance, avoid self-medication. Parents are advised to pay attention to the recovery of their babies and to keep them warm and hydrated. Seek active medical attention and be evaluated by a specialist.